ASTROSAT CZTI

Data Quality Report

Orbit 57657

Creation date: 2026-05-25T15:34:15.301281
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_125T09_9000006578_57657cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57657cztM0_level2_quad_clean.evt
Size (bytes)439,672,320100,730,880
Size419.3 MB 96.1 MB
Events in quadrant A3,347,177667,888
Events in quadrant B3,219,475716,727
Events in quadrant C4,070,308637,787
Events in quadrant D5,112,492557,051

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148602
B0143232
C0168932
D0198602

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67611041.538234%
B67601161.715976%
C67601572.322485%
D67605968.816568%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7696 6762 36 36 0.47% 0.53%
B 7695 6761 23 23 0.30% 0.34%
C 7695 6761 74 74 0.96% 1.09%
D 7695 6761 492 492 6.39% 7.28%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 7 223 322014 1762.2 748 730 182.3
A 4 3 124884 680.97 748 730 182.3
A 13 254 9687 49.13 748 730 182.3
B 5 185 146978 929.44 738 709 157.4
B 5 172 68916 433.41 738 709 157.4
B 0 171 20004 122.61 738 709 157.4
C 15 224 807910 4104.28 725 721 196.7
C 12 254 260754 1322.18 725 721 196.7
C 12 2 85129 429.19 725 721 196.7
D 8 240 1242799 6393.12 695 665 194.3
D 3 12 257406 1321.42 695 665 194.3
D 7 253 197391 1012.53 695 665 194.3

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter